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Rumors of a secret romance between Katie Holmes and Jamie Foxx continue to swirl after the pair spent time together in New York during Super Bowl weekend.

We are told Holmes, 35, and Foxx, 46, have been seeing each other since last summer and recently spent time together at his mansion in California. But they’re keeping their relationship under wraps out of respect for her ex­husband Tom Cruise, sources add.

One source said, “Katie flew private to California to stay with Jamie at his home around the Grammys [which took place Jan. 26].

“Foxx’s beautiful daughter Corinne was his date for the Grammys. But he and Holmes also spent time together during Super Bowl weekend, although they attended the game separately,” the insider noted.

But the source added they are treading carefully because Cruise is a friend of Foxx. The two actors appeared together in 2004 crime thriller “Collateral.” Cruise and Holmes split in July 2012 after just less than six years of marriage. “Jamie is being careful because he has a lot of respect for Tom,” our insider added.

Holmes and Foxx were first linked after they were spotted dancing together at Ron Perelman’s Apollo in the Hamptons gala last August. At the time, both strongly denied rumors of a romance.Oscar winner Foxx said last summer, “[The rumors] are 100 percent not true. In fact, it’s quite hilarious because we simply danced at a charity event along with a lot of other people.”Foxx also joked to ABC News at the time, “I had Colin Powell onstage dancing [too], so they could have said me and Colin Powell were ­dating,” and branded the buzz about Holmes “absurd.”But we are told the couple have remained close and also quietly met in Miami over the New Year’s holiday.

Holmes’ rep denies the story, saying her trip to California was to meet a director about a new movie project. Foxx’s rep declined to comment.